Work holder for grinders



April 9,1935. c. l. LOTT WORK HOLDER FOR GRINDERS Filed NOV. 25, l9 33nu mun llll Ill.

Patented Apr. 9, 1935 UNITED STATES PATENT OFFICE I 1,996,873 WORK noumnFOR. GRINDERS Charles Ira Lott, Lansing, Mich. Application November 23,1933, Serial No. 699,442

7 Claims.

The invention relates to work holders for grinders, and has for itsobject to provide a device of this character comprising an elongatedmember having one or a plurality of apertures extending entirely throughthe same and adapted to receive therein one or more barrel-shapedbearing rollers to be finished by passing the bar through rollers, whichrollers revolve the bearing rollers for grinding the peripheral facesthereof.

A further object is to provide concave opposite walls in the aperturesof the elongated member conforming with the shape of the sides of therollers to be held therein for ensuring against transverse displacementof the rollers in the apertures during their rotation and with theiropposite convex sides projecting beyond the opposite sides of theelongated member where they can be engaged by turning and grindingwheels when passed between said wheels.

A further object is to form the elongated members from hingedlyconnected sections having registering recesses forming the rollerreceiving apertures, and when open allowing insertion of the bearingrollers.

A further object is to provide means whereby one of the holder sectionsmay move longitudinally in relation to the other holder section, therebyallowing the sections to accommodate themselves to proper registrationon opposite ends of the bearing.elements held therein, according to theshape of the bearing.

A further object is to provide means for holding the holder sections inclosed position at their free ends.

With the above and other objects in view the invention resides in thecombination and arrangement of parts as hereinafter set forth, shown inthe drawing, described and claimed, it being understood that changes inthe precise embodiment of the invention may be made within the scope ofwhat is claimed without departing from the spirit of the invention.

In the drawing:

Fig. 1 is a perspective view of the work holder showing a plurality ofbarrel bearing members therein;

Fig. 2 is a side elevation of the holder;

Fig. 3 is a top plan view of the holder showing the same in position tobe passed between a rotating guide roller and a grinding wheel;

Fig. 4 is a detail perspective view of a portion of one of the hingedbar members; and

Fig. 5 is a vertical transverse sectional view through the carrier bar,showing the same in position between, the rotating roller and thegrinder wheel. I

Referring to the drawing, the roller holder comprises elongatedsections, l and 2, which sections are preferably hingedly connectedtogether at 3 through an elongated slot 4 whereby the sections maymoveslightly longitudinally in relation to each other to accommodatethemselves to the rollers 5 disposed therein, and which rollers arepreferably of the barrel type as shown. It is to be understood that theholder can be utilized for cylindricalrollers if desired, and applicantdoes not limit himself in this particular. The loose connection formedby the pin 3 and elongated aperture 4 will allow proper reception of theends of the barrel-shaped bearing members 5, as the sections 1 and 2 areswung together towards closed position as clearly shown in Figs. 1 and2. Although it is not absolutely essential to provide fastening meansbetween the sections I and 2 at their free ends, as the sections,incident to their weight and horizontal movement over the grinder table6, would remain closed, they are preferably provided with a springfastener l at their free ends for preventing accidental opening of theholder while handling.

The holder sections l and 2 are provided with recesses 8 which registerwhen the sections are in closed position, as shown in Fig. 2, and thesections when closed bring the recesses 8 into registration so that theyconform tothe shape transversely of the rollers 5 and receive oppositesides of the rollers in the recesses 8, which are concave and conform tothe peripheral contour of the rollers, thereby preventing transversedisplacement of the rollers in the apertures of the bars I and 2.

It will be noted that the carrier bar as a whole is narrower than thediameter of the bearing rollers 5, therefore said bearing rollers willextend beyond the opposite sides of the bar so that their peripherieswill engage the roller rotating wheel I I which preferably rotates inthe direction of the arrow 11. for rotating the rollers 5 in theopposite direction to the direction of rotation of the grinder wheel I0,located on the opposite side of the holder, and which grinder wheel istransversely curved as well as circumferentially channeled to conform tothe desired curvature of the rollers. It is to be understood that therollers are first made substantially to dimensions and that the grindingoperation finishes and polishes them to dimensions.- It will be notedthat as the bars are passed between the grinding and turning wheels I0and l l, the rollers will be finished and polished as they areprogressively placed in engagement with the wheel by the operator.Although a limited number of rollers are shown in the holder, any numbermay be placed therein, and the holder may be of any length desired.

From the above it will be seen that a bearing roller holder is providedfor holding the rollers while rotating and grinding, and said device issimple in construction, the parts reduced to a minimum, and said rollersare held rotatably in the holder by engagement with concave walls withinthe holder, thereby obviating other holding means and allowing oppositesides of the rollers to project beyond the sides of the holder into thepath of rotatable wheels of a finishing machine.

The invention having been set forth, what is claimed as new and usefulis:-

1. A device for holding barrel-shaped rollers during grindingof theconvex sides comprising a bar of less thickness than the smallestdiameter of the rollers, said bar being formed with a recess havingsides conforming in shape to the convex sides of the rollers, the axisof said recess extending transverse to the axis of the bar whereby theentire length of the convex sides of the rollers are accessible forgrinding.

2. A device for holding barrel-shaped bearing rollers during grinding ofthe convex sides comprising a longitudinally movable member havingroller receiving seats therein extending entirely therethrough andhaving sides conforming in shape to the convex sides of the rollers, theaxis of said seats extending transverse to the axis of the bar, saidseats being positioned so that the entire length of the sides of therollers extend beyond the sides of said member and are accessible forthe grinding.

3. A device for holding barrel-shaped bearing rollers during grinding ofthe convex sides comprising a longitudinally movable member havingroller receiving seats therein extending entirely therethrough andhaving sides conforming in shape to the convex sides of the rollers, theaxis of said seats extending transverse to the axis of the bar, saidlongitudinal member being narrower than the diameter of the rollers,whereby the sides of the rollers extend beyond the sides of said memberand are accessible for the grinding.

4. A device for holding barrel-shaped bearing rollers during grinding ofthe convex sides thereof comprising a longitudinally movable memberhaving roller receiving recesses extending entirely through the same,said recesses having concave walls conforming to the shape of the sidewalls of the rollers, the axes of said recesses extending transverselyof the member, said member being narrower than the rollers, wherebyopposite sides of the rollers in said recesses extend beyond oppositesides of the member and are accessible for grinding.

5. A device for holding barrel-shaped bearing rollers during grinding ofthe convex sides thereof comprising a longitudinally movable memberhaving roller receiving recesses extending entirely through the same,said recesses having concave walls conforming to the shape of the sidewalls of the rollers, the axes of said recesses extending transverselyof the member, said member being narrower than the smallest diameter ofthe rollers, whereby opposite sides of the rollers in said recessesextend beyond opposite sides of the member and are accessible forgrinding.

6. In a device for holding barrel-shaped bearing rollers during grindingof the convex sides thereof, a work-holding magazine comprising alongitudinally movable member having roller receiving aperturesextending entirely through the same, said apertures having concavedwalls conforming to the shape of the sides of rollers, the axes of saidapertures extending transversely of the member and cooperating withopposite sides of rollers for rotatably holding the rollers in theapertures, the thickness of said member'being less than the smallestdiameter of the rollers whereby opposite sides of said rollers aresimultaneously accessible for grinding, said member being formed fromregistering sections having portions of the roller apertures therein.

7. In a device for holding barrel-shaped bearing rollers during grindingof the convex sides thereof, a work-holding magazine comprising anelongated longitudinally movable member having roller receivingapertures therein, the axes of said apertures extending transversely ofsaid member, means for holding rollers rotatably within the apertureswith the entire extent of their opposite sides of the rollers extendingbeyond opposite sides of the longitudinally movable member wherebyopposite sides of said rollers are accessible, said longitudinallymovable member being formed from'hingedly connected sections havingrecesses therein which register when the sections are in closed positionfor forming the roller receiving apertures and receiving the ends 01'the rollers.

CHARLES IRA LOTI.

